Manufacture of machine-braided lace



Dec. 21,1926. Y 1,611,619

E. TURCK MANUFACTURE OF MACHINE BRAIDED LACE Filed April 1. 1925 v InVenfor: ye 73/14" 3y wrru l v Patented Dec. 21, 1926.

UNITED STATES EUGEN TURCK, or BARMEN, GERMANY.

/ MANUFACTURE or MA CHINE-BRAIDED LACE.

Application filed April 1, 1925, Serial No. 19,777, and in Germany April11, 1924.

The present invention lam reference to' improvements in themanufacture'of lace on the single thread-Malhere braiding machinedescribed in the U. S. Patent No. 613,380,

5 in which a lace web is continuously formed in tubular shape about astationary mandrel,

. and is subsequently drawn off the mandrel and opened out fiat. In theprior art the closed lace tube or hose was formed by unitingthelongitudinal opposed fabric edges by means of auxiliary interwoventhreads,

' which later, for the purpose of opening up the tube, had to be out andthen withdrawn, which procedure wasted time and material.

In the later art it was proposed to do away with these edge-connectingauxiliary threads by guiding the fabric edges on wire members andrunning one or more steadying threads in zig-zag fashion over these wireguides, as described for instance in the U. S. Patent No. 1,024,247.When the lace tube thus formed was drawn off the mandrel, thesesteadying threads, which were not'embodied in any way in the lacestructure proper, readily slipped off the wire guides along with thelace edges, and were then recovered for repeated use, and'the lace tubewas then automatically opened in well known manner and laid out flat. Inpractical operation this procedure, however, was found defective forvarious reasons, mainly because it did not prevent, as was hoped, thedeformation of the web fabric upon the latterbeing drawnoff the mandrel.

Irf my endeavors to remedy this' serious drawback I found that thisdistortion and deformation of the web structure is due to the relativearrangement and action of the two drawing-off rollers of the old art,which are positioned at opposite sides of the 3 portion of the mandrelhorizontally one behind the other, so that the web. is unevenly seizedon opposite sides and is unevenly stressed and pulled out of shape.

According to the present invention this defect is effectively obviatedby guiding and temporarily uniting the longitudinalopppsed edges of theweb during and for a short period after the formation of the latter onstationary guide means, if desired with the aid of one or more auxiliarythreads, and by then seizing the web tube and drawing it off the mandrelby means of two horizontally alined draw-off rollers, which are causedto 'pullingly act on opposite sides of the web vent therebyone-sidedstrcss and undue dis tortion and deformation thereof.

During the drawing-off step the longitudi nal web edges automaticallyslide off the guide means,

whereupon the web tube is opened out flat in the well known manner.

The use of theauxiliary threads can also be dispensed with entirely byproviding only a single guide element for temporarily .unit-edly guidingthe longitudinal edges of" the forming web tube.

The accompanying drawing illustrates by way of. example apparatus forcarrying out the new method, in which drawing Fig. 1 is aside-elevation, partly in section, of the thread collector and draw-oilmechanism, and

Fig. 2 is a plan view, partly in section on the line 2-2 'in Fig. 1.

Referring to the drawing, Z) indicates the closed ring collector inwhich the braiding threads unwinding from bobbins (not shown,-runtogether and at the lower edge of which, the web is formed. As usual thecollector b surrounds a stationary mandrel c whileleaving therebetween apassage for the web a, which mandrel at its lower portion has a circularcross-section whereas, at its upper portion, it has a fiat, rectangularcross-section. Upon this mandrel the web a is formed in well knownmanner. According to the present invention, the web is obtained intubular form by guiding the two longitudinal edges of the web on asingle common guiding member (Z, the lower end of which is rigidlysecured to the machine, and the upper end of which freely extends upthrough the collector ring Z). The longitudinal edges of the web areguided on the guide member for example by loops (1 of one edge and loopsa of the other being so able shortened and its tapering alternatelyguided on the wire that the latter holds the web together in tubular'form, while said guide member owing to its being embraced alternatelyby the. edge-loops of positioned opposite to each other at the samelevel, these rollers being situated .as

closely "as possible over the collector-ring b so that, immediatelyafter leaving the latter, the Web surrounding the mandrel is grippedsimultaneously on two opposite sides and consequently on its full or ap'proximately full width by the two rollers, and is in this way drawn offupwardly perfectly uniformly, In comparison with known mandrelsthe-mandrel c is considerfaces are curved to correspond with theoperative contour of the peripheral faces of the draw-oft rollers h, h.Its terminal rectangularly flattened portion is preferably curved abovet is draw-off rollers h, "h, to overhang one of the rollers. I

The guide member d is conveniently arranged in the middle plane betweenthe two rollers 71., it so that it is located at one of the narrow sidesof the flattened portion of.

the mandrel. Consequently the guide wire can extend into theintermediate space between the two the web when it is grasped andadvanced by the rollers is still tubular form by ly is positively edges,this completely obviating deformation'.

Glaims.

1.The *described method of producing flat lace by the single threadMalhere braiding machine, which consists in held together in the duringthe travel of the tube from its formawhich is flattened off at its upperportion, and are draw-off rollers h, h, so that I the wire d, andconsequent.

guided at its longitudinal Presenting a cylindrical braidingly' forminga longitudinally split web tube, in

flat lace by the single thread Malhere braid-- ing 'machine," whichconsists in braidingly forming a) longitudinally split web tube, inseizing and taking off this tube close above its formative zonesimultaneously at circumferential points all equidistantly space fromthe formative zone, in unitingly guiding theweb edges during the travelof the tube from its formative zone to' the takeoff zone, and lisunitingand releasing them at the latter zone, and in tensioning the temporarilyclosed tube during its passage between these two zones.

3. Apparatus for carrying out the described method of producing flatlace, comprising in combination with the mandrel forming the tubularweb, a pair of take-up rollers mounted relatively closely above the webforming zone, and stationary guide means terminating close to saidrollers for temporarily guiding the longitudinal edges,

Web forming. zone, and stationary guide relation to.

means terminating in close said rollers for temporarily unitedly guidingthe longitudinal web edges from ,the formative zone of the web to itstake-off zone, the upper portionof the mandrel being conravely flattenedto conform to the cooperating circumference of said rollers.

. Apparatus for carrying out the described method of producingmachine-braided lace on a single thread machine, comprise ing incombination, a web-forming mandrel, body portion and a a pair of take-upeach-side of said tapering head portion, rollers mounted one on mandrelclose above the web-forming zone, and a stationary guide member arrangedlongitudinally of the mandrel in its middle plane and extending alongone of its narrowhead edges up between the said two rollers fortemporarily guiding the longitudinal edges of the web from, the point ofits formation to the take-off point.

In test mony'whereof I aflix my signature.

EuGEn TURGK.

